Create 17_6_getinfo.playground

src/17_6_getinfo.playground

@@ -0,0 +1,95 @@
+import Foundation
+
+func makeCommand(method: String, param: Any, completionHandler: @escaping (Any?) -> Void) -> Void {
+
+// 1. Build a URL
+    
+    let testnetRpcPort = "18332"
+    let nodeIp = "127.0.0.1:\(testnetRpcPort)"
+    let rpcusername = "oIjA53JC2u"
+    let rpcpassword = "ebVCeSyyM0LurvgQyi0exWTqm4oU0rZU"
+    let walletName = ""
+    let walletUrl = "http://\(rpcusername):\(rpcpassword)@\(nodeIp)/\(walletName)"
+
+    let url = URL(string: walletUrl)
+
+// 2. Build a Request
+    
+    var request = URLRequest(url: url!)
+    request.httpMethod = "POST"
+    request.setValue("text/plain", forHTTPHeaderField: "Content-Type")
+    request.httpBody = "{\"jsonrpc\":\"1.0\",\"id\":\"curltest\",\"method\":\"\(method)\",\"params\":[\(param)]}".data(using: .utf8)
+
+// 3. Build a Session
+    
+    let session = URLSession(configuration: .default)
+    let task = session.dataTask(with: request as URLRequest) { data, response, error in
+
+        do {
+
+
+            if error != nil {
+
+                    //Handle the error
+                    
+            } else {
+                    
+                if let urlContent = data {
+                        
+                    do {
+                            
+                        let json = try JSONSerialization.jsonObject(with: urlContent, options: JSONSerialization.ReadingOptions.mutableLeaves) as! NSDictionary
+                        if let errorCheck = json["error"] as? NSDictionary {
+                                                                
+                            if let errorMessage = errorCheck["message"] as? String {
+
+                                print("FAILED")
+                                print(errorMessage)
+
+                            }
+                                
+                        } else {
+                                
+                            let result = json["result"]
+                            completionHandler(result)
+                            
+                        }
+                            
+                    } catch {
+                            
+                            //Handle error here
+                            
+                    }
+                        
+                }
+                    
+            }
+                
+        }
+            
+    }
+
+//    return response
+    task.resume()
+    
+}
+
+// Test getblockchaininfo
+
+var method = "getblockchaininfo"
+var param = ""
+
+makeCommand(method: method,param: param) { result in
+    
+    print(result!)
+    let blockinfo = result as! NSDictionary
+    let block = blockinfo["blocks"] as! NSNumber
+
+    // Test getblockchash
+    
+    method = "getblockhash"
+    makeCommand(method: method,param: block) { result in
+        print("Blockhash for \(block) is \(result!)")
+    }
+    
+}